KR20150082513A - Transfer system - Google Patents

Abstract

The conveying system of the present invention is a conveying system for conveying a tray in which a plurality of workpiece placing portions on which workpieces are placed in a matrix form is conveyed in a horizontal posture and includes a first conveying section having a plurality of conveying lines for conveying the tray, A second conveying section having at least one conveying line for conveying the tray from the first conveying section, and a second conveying section for conveying the tray from the conveying line of the first conveying section to the second conveying section between the first conveying section and the second conveying section, A second conveying unit for conveying the tray on the conveying line of the first conveying unit and the conveying line of the second conveying unit; And a line sensor for photographing an image in a direction orthogonal to the first imaging device, And a moving device for moving the plurality of transfer lines of the carry section in a direction transverse to the transfer line.

Description

Transfer system

The present invention relates to a transport system for transporting a work.

BACKGROUND ART [0002] As a conveying mode of a small work represented by an electronic part, there is known a conveying mode in which a plurality of works are placed on a tray and conveyed collectively. In the system employing such a transport mode, the processing for the work is performed, for example, by taking out the work from the tray one by one. After processing, it is returned to its original position or placed as a processed work on another tray. In such a system, it is often necessary to manage the relationship between the position on the tray and the work and the presence or absence of work at each of the seating positions on the tray. Therefore, a system has been proposed in which a tray is photographed and the seating state of the workpiece is specified from the image data. For example, Patent Document 1 discloses a system employing a camera capable of collectively taking out a whole tray in a specific area. Patent Document 2 discloses a system for photographing a tray with a photographing apparatus provided for each conveying line of the tray.

Patent Document 1: Japanese Patent Application Laid-Open No. 7-120530 Patent Document 2: Japanese Patent Laid-Open Publication No. 2011-232275

In a system in which a dedicated area for photographing a tray is provided as in the system of Patent Document 1 and a photographing apparatus is placed in the exclusive area and photographing is performed and thereafter a predetermined process is performed, It is necessary to take a picture after the completion of the conveyance and to perform a predetermined process after the completion of the photographing, thereby lowering the conveying efficiency until the start of the process. In addition, in a system in which a photographing apparatus is provided for each conveying line of a tray as in the system of Patent Document 2, the number of photographing apparatuses is increased and the cost is increased.

An object of the present invention is to make it possible to shoot a tray while suppressing a conveying efficiency deterioration or an increase in cost.

According to the present invention, there is provided a conveyance system for conveying a tray, in which a plurality of workpiece receiving portions on which workpieces are placed, arranged in a matrix form in a horizontal posture, comprising: a first conveyance section having a plurality of conveyance lines for conveying the tray; A second conveying section having at least one conveying line for conveying the tray from the conveying section; and a second conveying section for conveying the second conveying section from the conveying line of the first conveying section, between the first conveying section and the second conveying section, And a second conveying unit for conveying the tray to the conveying line in a direction perpendicular to a direction in which the tray is moved by the moving and mounting apparatus between the first conveying unit and the second conveying unit, An image pickup unit including a line sensor for picking up an image in a direction in which the image pick- The transfer system comprising: a moving device to move in a direction transverse to the plurality of the return line is provided.

According to the present invention, it is possible to photograph a tray while suppressing conveying efficiency deterioration or cost increase.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a layout diagram of a transport system and a perspective view of a tray according to an embodiment of the present invention; Fig.
2 is an exploded perspective view of the base unit;
3 is a perspective view of a transfer device.
FIG. 4 is an explanatory view of the operation of the transport apparatus of FIG. 3;
5 is a perspective view of the conveying device;
6 is a perspective view of a mobile mounting part;
7 is an explanatory diagram of an identification mark given to a tray and a work.
8 is an explanatory diagram relating to an identification code of each work rest portion of the tray.
Fig. 9 is an explanatory diagram of image capturing, tray information, and work information of a tray and a work.
10 is an explanatory view of the operation of the work detection unit;
11 is an explanatory diagram of a workpiece conveying unit;
12 is a block diagram of a control unit of the transport system of Fig. 1;
13 is an explanatory diagram of an example of the operation of the transport system of Fig. 1;
Fig. 14 is an explanatory diagram of an example of the operation of the transport system of Fig. 1; Fig.
Fig. 15 is an explanatory diagram of an example of the operation of the transport system of Fig. 1; Fig.
16 is an explanatory diagram of an example of the operation of the transport system of Fig.
FIG. 17 is an explanatory diagram of an example of the operation of the transport system of FIG. 1;
FIG. 18 is an explanatory diagram of an example of the operation of the transport system of FIG. 1;
Fig. 19 is an explanatory diagram of an example of the operation of the transport system of Fig. 1; Fig.

<System overview>

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, X and Y indicate a horizontal direction which is a first direction and a second direction orthogonal to each other, and Z indicates a vertical direction which is a third direction orthogonal to the horizontal direction. 1 is a layout diagram of a transport system A and a perspective view of a tray T according to an embodiment of the present invention.

The tray T is a member for placing a workpiece. In this embodiment, the workpiece T is placed on the tray T and is transported. In the case of the present embodiment, the tray T has a square plate as a whole and includes a square bottom plate portion Ta and a square stage portion Tb one step higher than the bottom plate portion Ta integrally have. On the upper surface of the stage portion Tb, a plurality of workpiece receiving portions Tc on which the workpiece is placed are arranged in a matrix in the horizontal direction. In the case of the present embodiment, the workpiece mounting portion Tc is a square concave portion provided at 16 positions in total of four positions in the vertical direction and four positions in the horizontal direction.

The conveying system A is a system for conveying the tray T in a horizontal posture including a first conveying unit 1, a second conveying unit 2, a moving mounting unit 3 and a workpiece conveying unit 4 . In the case of the present embodiment, the tray T is first fed to the first conveying section 1 by an apparatus or an operator (not shown), and is conveyed from the first conveying section 1 to the second conveying section 3 by the moving- (2). The workpiece transfer unit 4 moves the upper side of the second transfer section 2 in the X direction to exchange workpieces between the other trays T on the second transfer section 2. [ After the work is replaced, the tray T is taken out from the second carrying section 2 by an apparatus (not shown) or an operator.

The first carrying section 1 is provided with a plurality of carrying apparatuses 10A to 10C (hereinafter collectively referred to as carrying apparatus 10). Each transport apparatus 10 constitutes a transport line for transporting the tray T in a horizontal posture in the Y direction. Furthermore, each of the transport apparatuses 10 is arranged side by side in the X direction such that the respective transport lines are parallel. In the present embodiment, the number of conveying apparatuses 10 (the number of conveying lines) is three, but two or four or more conveying apparatuses may be used.

The second transport section 2 is provided with a plurality of transport apparatuses 20A to 20E (hereinafter collectively referred to as a transport apparatus 20). Each conveying device 20 constitutes a conveying line for conveying the tray T in a horizontal posture in the Y direction. Further, each of the transport apparatuses 20 is arranged side by side in the X direction such that the respective transport lines are parallel. The number of conveying apparatuses 20 (the number of conveying lines) is five in the present embodiment, but at least one may be required.

The transport apparatuses 10 and 20 and the mobile loading section 3 are provided with a common base unit 50. The main unit 50 is a transport unit for transporting the tray T in a horizontal posture. In the present embodiment, the system configuration is simplified by individually improving or configuring the transport units 10 and 20 and the mobile unit 3 while making the basic unit 50 common. However, different transport units may be provided for the transport apparatuses 10 and 20 and the mobile unit 3, respectively. The first transfer section 1 (the plurality of transfer apparatuses 10), the second transfer section 2 (the transfer apparatus 20), and the transfer mounting section 3 And the workpiece conveying unit 4 are provided integrally at a predetermined position on a common platform (not shown).

<Basic unit>

Fig. 2 is an exploded perspective view of the base unit 50. Fig. The main unit 50 includes a base member 51, a transport mechanism 52, 52, and guide members 53, 53.

The base member 51 includes a bottom wall extending in the transport direction (Y direction) of the tray T, a pair of side walls erected from both side portions of the bottom wall, (I.e., a sidewall side). The base member 51 has a C-shaped cross section with an open top and a cylindrical shape with both ends open in the Y-direction as a whole. For this reason, an inner space is formed inside the base member 51. The base member 11 can be a member integrally formed by, for example, bending a metal plate by press working or the like.

Guide members 53 and 53 are fixed to the edge of the upper portion of the side wall of the base member 51. The guide member 53 guides the movement of the tray T so that the tray T does not meander at the time of conveyance of the tray T. [ The guide members 53 and 53 are set such that the distance between the inner side surfaces thereof is slightly wider than the width in the X direction of the bottom plate portion Ta of the tray T. [ The guide members 53 and 53 guide the side surface of the bottom plate portion Ta to prevent the tray T from skewing.

The transport mechanism 52 is supported on the inner side wall of the base member 51 to transport the tray T. In the case of the present embodiment, the transport mechanism 52 constitutes a belt transmission mechanism, but may be another kind of transport mechanism.

The conveying mechanism 52 includes a driving source 521 such as a motor and a driving pulley 522 supported by the driving source 521 and rotated together with the driven pulley 523 and the driving pulley 522 and the driven pulley 523, And an endless belt 524 wound around the endless belt 524. The endless belt 524 runs by the rotation of the drive pulley 522.

The driving source 521 is supported on the inner side wall of the base member 51 via the supporting member 525, respectively. The support member 525 has a mounting portion 525a. The mounting portion 525a has, for example, a screw hole. A bolt (not shown) is inserted into the hole 51a so that the bolt is screwed to the mounting portion 525a so that the support member 525 is inserted into the base member 51, As shown in Fig.

The driven pulley 523 is rotatably supported by a shaft member 526. [ The shaft member 526 has, for example, a screw hole. A bolt (not shown) is inserted into the hole 51b and the bolt is screwed to the shaft member 526 so that the shaft member 526 is fixed to the base member 51 As shown in Fig. In the case of the present embodiment, the driven pulley 523 has a diameter smaller than that of the drive pulley 522, so that the driven pulley 523 can arrange more different components in the inner space of the base member 51 have.

The tray T is laid over the endless belts 524 and 524 and is transported in the longitudinal direction (Y direction) of the base member 51 by the running of the endless belts 524 and 524 . It is also possible to reverse the carrying direction by switching the running direction of the endless belts 524 and 524.

<Transport device>

Next, the configuration of the transport apparatuses 10 and 20 will be described. First, the transport apparatus 10 will be described with reference to Fig. Fig. 3 is a perspective view of the transfer device 10. Fig.

The conveying apparatus 10 includes a support table 11 for supporting the base unit 50, four tray guides 12, two tray supporting units 13, elevating apparatus 14 and tray detecting sensors 15 and 16 .

The tray guide 12 is a columnar member for supporting a plurality of trays T in a stacked state. Each tray guide 12 has an L-shaped cross section and guides the corners of the bottom plate portion Ta of the tray T in the vertical direction. The tray (T) is disposed in a stacked state inside the four tray guides (12).

The tray supporting unit 13 includes a driving unit 13a, a moving unit 13b, and a seating plate 13c. The driving portion 13a is an actuator that moves the movable portion 13b in the X direction and is, for example, an electric cylinder. The seating plate 13c is fixed to the movable portion 13b and a peripheral edge portion of the bottom plate portion Ta of the tray T is placed.

The elevating device 14 includes an elevating table 14a and a driving mechanism (not shown) (for example, an electric cylinder) for elevating the elevating table 14a. A tray T is placed on the lifting table 14a. An opening 51a (see Fig. 4) is formed in the bottom wall of the base member 51 of the base unit 50, and an opening 51a (see Fig. 4) (14) can pass through these openings (11a, 51a).

The tray detection sensors 15 and 16 are sensors that detect the tray T passing over the tray detection sensors 15 and 16, for example, a reflection type optical sensor. The detection results of the tray detection sensors 15 and 16 are used for timing control of the photographing operation of the tray T by the photographing unit 30 described later.

Next, the operation of the transport apparatus 10 will be described. Fig. 4 is an explanatory view of the operation of the transport apparatus 10. Fig. The state ST1 shows a state in which a plurality of trays T are laid on an elevating table 14a in a stacked state. The elevation table 14a is in the raised position and each tray T is guided to the four tray guides 12 at the four corners thereof in the vertical direction to be located inside the four tray guides 12. [ The movable parts 13b and 13b are in the retracted positions in which the seating plates 13c and 13c are spaced from the tray T in the X direction. The transport apparatus 10 has a function (single separation function) for transporting the trays T one by one from a plurality of trays T in a stacked state.

Specifically, by lowering the lifting table 14a to a predetermined height, the seating plates 13c, 13c of the tray supporting units 13, 13 are moved between the lowermost tray T and the second tray T from below Position the stacked tray (T) at the position where it can enter. Subsequently, the driving units 13a and 13a are driven to bring the seating plates 13c and 13c between the lowermost tray T and the second tray T from below. The state ST2 indicates this state.

Next, the lowermost tray T is lowered by further lowering the elevation table 14a, but the other trays T are not placed on the seating plates 13c and 13c. Thus, only the lowermost tray T can be &quot; separated &quot; (or &quot; cut &quot;) and placed on the endless belts 524 and 524 of the base unit 50. The state ST3 indicates this state. When the endless belts 524 and 524 are driven, the lowermost tray T can be transported.

Thereafter, by returning to the state of the state ST1 and repeating the same procedure, the tray T can be "singly separated" from the plurality of stacked trays T one by one and can be carried out to the mobile loading section 3. [ It is also possible to put the trays T one by one in the stacking state by the reverse order. That is, when the tray T is transported from the mobile loading section 3 to the transporting apparatus 10, the tray T is positioned on the lifting table 14a by reversing the transport direction of the base unit 50. [ The elevating table 14a is raised to support the tray T to the tray supporting units 13, Thereafter, similarly, the tray T is stacked up from below to collect the tray T and to put it in the stacking state.

Next, the transport apparatus 20 will be described with reference to Fig. The transport apparatus 20 is provided with positioning mechanisms 21 and 22 for positioning the tray T in the X and Y directions.

The positioning mechanism 21 is an actuator that moves the contact portion 21a in the direction of the arrow d1 (Z direction) in the case of the present embodiment, and is, for example, an electric cylinder. In the case of positioning, the contact portion 21a is raised and the front side of the bottom plate portion Ta of the tray T is brought into contact with the circumferential surface thereof. This makes it possible to position the tray T in the Y direction. When the tray T is taken out to the outside, the contact portion 21a is lowered to release the contact with the tray T, and the tray T can be moved above the contact portion 21a.

The positioning mechanism 22 includes a driving portion 22a and an arm portion 22b in the case of the present embodiment. The driving portion 22a is an actuator for moving the arm portion 22b in the d2 direction (X direction) and is, for example, an electric cylinder. The front end of the arm portion 22b can contact the side surface of the stage portion Tb of the tray T. [ The arm portion 22b is advanced to the side of the tray T in the X direction and the leading end of the arm portion 22b is brought into contact with the side surface of the stage portion Tb of the tray T. [ The tray T is pressed against the opposite guide member 53 and the sides of the bottom plate Ta come into contact with the guide member 53. [ This makes it possible to position the tray T in the X direction.

As described above, the conveying apparatus 20 includes the positioning mechanisms 21 and 22 to stop the tray T at one end in the Y direction of the conveying apparatus 20 in a state of being positioned in the X direction and the Y direction, .

&Lt;

Next, the configuration of the mobile unit 3 will be described with reference to Fig. Fig. 6 is a perspective view of the mobile mounting section 3. Fig. The mobile mounting section 3 includes a main unit 50, a photographing unit 30, a moving device 31, and a workpiece detecting unit 32.

The base unit 50 functions as a mobile platform. That is, the main unit 50 is arranged between the first conveying unit 1 and the second conveying unit 2 in the conveying line 10 of the first conveying unit 1 or the conveying line 10 of the second conveying unit 2, (T) from the conveying line (10) of the first conveying section (1) to the conveying line (20) of the second conveying section (2) do.

The photographing unit 30 includes a line sensor 301, an illuminating device 302, a photographing control unit 303 and support members 304 to 306 for supporting them.

The line sensor 301 is arranged at the central portion in the X direction above the vicinity of the carrying apparatus 10 side in the Y direction of the main unit 50. [ The line sensor 301 photographs an image of the tray T that is mounted and moved by the main unit 50 between the first carry section 1 and the second carry section 2 from above. The line sensor 301 is arranged in a direction (X direction) in which the image pickup elements are orthogonal to the moving direction of the tray T. Therefore, the photographed image becomes a three-dimensional, one-dimensional image that is long and narrow in the X direction.

The illuminating device 302 has a light emitting element and adjusts the brightness of the photographing range by the line sensor 301 by looking at the tray T to be photographed. The illumination device 302 is mounted on a pair of support members (column members) 305 and 305 through a support member 306 (in this embodiment, a pair of support members (brackets) 306 and 306) . The illumination device 302 is mounted on the support member 306 so as to be rotatable about the X-axis in order to make the irradiation direction adjustable.

The photographing control unit 303 includes a computer for controlling the photographing operation of the line sensor 301. [ The imaging control unit 303 also functions as an image generation unit that processes a photographed image of the line sensor 301 and an information generation unit that analyzes the photographed image and generates information in the case of the present embodiment.

The support member 304 constitutes a top plate of the photographing unit 30 and the pair of support members 305 and 305 constitute a columnar shape for supporting the support member 304. The support member 304 and the pair (Arch shape) is formed by the support members 305, The base unit 50 is disposed between the pair of support members 305, 305 so that the transport direction of the base unit 50 is orthogonal. The line sensor 301 and the image pickup control unit 303 are supported on the support member 304 and the support members 305 and 305. [

Here, examples of photographed images of the tray T photographed by the photographing unit 30 and examples of information generated from photographed images will be described with reference to Figs. 7 to 9. Fig. 7 is an explanatory diagram of the identification marks IDt and IDw given to the tray T and the work W. Fig.

The tray T is provided with an identification mark IDt. The identification mark IDt includes tray information capable of identifying individual trays T. The identification mark IDt may be constituted by a seal or the like as a separate body from the tray T or may be formed directly on the tray T (for example, engraved). (For example, direction) of the tray T by giving the identification mark IDt to a specific position. In the case of the present embodiment, the identification mark IDt is provided on the surface of the stage portion Tb. The identifier for identifying the posture of the tray T may be provided separately from the identification mark IDt. It is also possible to determine the posture of the tray T by including an identifier indicating the direction in the identification mark IDt.

The workpiece W has a rectangular plate shape in the case of the present embodiment. In the example of Fig. 7, the work W is not placed on all of the work receiving portions Tc, and the work W is not placed on some of the work receiving portions Tc.

The workpiece W is given an identification mark IDw. The identification mark (IDw) includes work information capable of identifying individual works (W). The identification mark IDw may be constituted by a seal or the like as a separate body from the work W and may be formed directly on the work W (for example, engraved).

(For example, the direction) of the work W by giving the identification mark IDw to a specific position. In the case of the present embodiment, the identification mark IDw is provided so that a predetermined direction can be discriminated at the corner of the surface of the work W. For example, the work W1 is set as a reference posture and its direction is expressed as 0 DEG. The direction of the work W2 is 90 degrees and the direction of the work W3 is 270 degrees (or -90 degrees). It is necessary to identify the posture of the workpiece W in the case where a specific portion of the workpiece W is sucked or held and carried or placed on the tray T with a posture of the workpiece W. [ The identifier for identifying the posture of the tray T may be provided separately from the identification mark IDt or the identifier for identifying the posture of the tray T may be provided to the work W. It is also possible to determine the posture of the work W by including an identifier indicating the direction in the identification mark IDw.

It may be necessary to distinguish which workpiece W is placed on which workpiece mounting portion Tc among the plurality of workpiece mounting portions Tc of the tray T on the management of the workpiece W. [ Thus, an identification code is assigned to each workpiece mounting portion Tc. Fig. 8 shows an example thereof. In the example of Fig. 8, identification codes 1-1 to 4-4 are assigned to 16 workpiece mounting portions Tc. This identification code and the tray information indicated by the identification mark IDt can specify which workpiece W is placed on which workpiece mounting portion Tc of which tray T the workpiece W is placed.

Fig. 9 is an explanatory diagram of image capturing, tray information and work information of the tray T and the work W. Fig. One photographed image by the line sensor 301 becomes a narrow one-dimensional image in the X direction as described above. Then, each shot image is synthesized and synthesized into one image to complete the entire image.

The whole image IMG in Fig. 9 is a conceptual diagram thereof, and is generated based on a plurality of images (partial images) img taken by the line sensor 301 with respect to one tray T. [ In the case of the present embodiment, it is assumed that the imaging control unit 303 generates the entire image IMG. The partial image img is an image obtained by one shot of the line sensor 301. A partial image img is obtained over the entire conveying direction of the tray T by controlling the photographing operation (for example, the photographing interval) of the line sensor 301 according to the moving speed of the tray T and successively photographing .

The first photographing by the line sensor 301 is performed after a predetermined time elapses from the detection of the tray T by the tray detecting sensor 15 of the conveying apparatus 10 and the last photographing is performed by the tray detecting sensor 16, The tray T can not be detected until the predetermined time elapses.

The moving speed of the tray T can be obtained from the control amount of the driving source 521 of the basic unit 50 or the operation amount detection result of the driving source 521 by the sensor.

The image pickup control unit 303 further determines whether or not the identification mark IDt of the tray T given to the tray from the entire image IMG of the tray T by the known image analysis technique Information is read from the identification mark (IDw) of the work (W). For example, characters (including symbols) appearing in the identification marks IDt and IDw are extracted from the images of the identification marks IDt and IDw, and character conversion processing of the extracted images is performed. As a result, tray information and work information can be obtained as character information capable of information processing on a computer. Based on the tray information of the tray T acquired by the imaging control unit 303 and the work information of the work W and the specification information of the tray stored in advance, the position of each workpiece mounting portion Tc And judges whether or not the work W is placed. Whether or not the work W is placed can be determined by whether or not the identification mark IDw exists in the contour of the workpiece mounting portion Tc.

According to the result of the image analysis, for example, the state information 60 of the tray T is generated. The state information 60 is created for each of the individual trays T identified by the tray ID (tray information), and includes the presence of the work W and the work ID (work information) for each of the work receiving portions Tc do. With this information, the work W mounted on the tray T and its position are displayed. In the present embodiment, the state information 60 further includes information indicating the posture of the work W.

The state information 61 of the work is associated with each work W, and in the example of Fig. 9, the information indicating the inspection result and the place of production is included.

6, the moving device 31 moves the main unit 50 and the photographing unit 30 in the direction (X direction) traversing the plurality of conveyance lines 10 of the first conveyance unit 1 . In the case of the present embodiment, the mobile device 31 includes a guide rail 311 and a moving body 312. The guide rails 311 extend in the X direction and are fixedly arranged on a base not shown to guide the movement of the movable body 312. [ The moving body 312 is a plate-shaped member having a predetermined length extending in the X direction which is the moving direction, and is movable in the X direction by engaging with the guide rail 311. The moving body 312 is moved by a driving mechanism (not shown). As the drive mechanism, a known mechanism may be employed. For example, a drive mechanism such as a motor and a transmission mechanism (for example, a belt transmission mechanism, a ball screw mechanism, a rack-pinion mechanism, etc.) . Further, a sensor such as an encoder for detecting the position of the moving body 312 can be provided, and the position can be controlled based on the detection result of the sensor.

The base unit 50 is fixed to the moving body 312. Therefore, the base unit 50 also moves by the movement of the moving body 312. [ The supporting members 305 and 305 are installed on the moving body 312 so that the photographing unit 30 is also fixed to the moving body 312. [ Therefore, the moving unit 312 moves the imaging unit 30 together with the base unit 50. [ Therefore, the moving body 312, which moves on the guide rail 311 fixed to the base (not shown), can stably move, and the moving body 312 can be moved in the X direction of the moving body 312, (Arcuate shape) parallel to the X direction, which is the moving direction, and is mounted and fixed. Therefore, the strength in the X direction can be improved, and the supporting member 304 and the pair of supporting members 305, It is possible to stably photograph by the line sensor 301 constituted in the member 304. [ Since the photographing unit 30 includes not only the line sensor 301 but also the illuminating device 302, it is possible to collectively move the materials necessary for photographing. Further, the illumination unit 302 and the support member 306 are disposed in the middle of the pair of support members 305 and 305 to connect the pair of support members 305 and 305, so that the support member 304 and the pair of The strength of the support structure formed by the support members 305 and 305 can be improved. The transporting device 10 and the transporting device 20 are disposed on the side of the mobile loading section 3 and move in the moving direction (X direction) of the moving body 312 so as to be positioned at a continuous position with the base unit 50 Respectively.

The work detection unit 32 detects a mounting state (presence or absence of projection, for example) of the workpiece W in the tray T that is loaded and carried by the main unit 50. [ In the case of the present embodiment, the work detection unit 32 includes a sensor 321, a reflector 322, and a lift unit 323 for lifting and lowering the sensor 321.

The sensor 321 is a reflective optical sensor in the present embodiment, and includes a light emitting element that emits light in the X direction and a light receiving element that receives reflected light from the reflector 322.

The sensor 321 is supported on one support member 305 through the lifting device 323. [ And the other supporting member 305 is supported by a reflecting member 322. [ The sensor 321 and the reflective member 322 are arranged so as to face each other in the X direction side portion of the base unit 50. [ The sensor 321 and the reflector 322 are arranged to detect the seating state of the work W from the side of the tray T. [

The elevating unit 323 includes an actuator such as an electric cylinder that adjusts the position of the sensor 321 in the Z direction to a predetermined height according to the type of the workpiece W or the type of the tray T . The reflector 322 is fixed to the support member 305 and has a length in the Z direction corresponding to the movement range of the sensor 321.

Fig. 10 is an explanatory view of the operation of the work detection unit 32. Fig. The workpiece detection unit 32 detects the seating state of the workpiece W on the tray T conveyed by the main unit 50 whether the workpiece W is placed in the workpiece mount Tc in a proper posture (horizontal posture). Specifically, in the present embodiment, the light irradiation / light receiving surface of the sensor 321 is disposed on the upper surface of the tray T (specifically, the tray T, the workpiece mounting portion Tc, W) of the height information).

The state ST11 illustrates the case where all of the workpieces W on the tray T are in a proper seating position (horizontal posture). In this case, the light emitted from the sensor 321 reaches the reflector 322, is reflected, and is received by the sensor 321.

The state ST12 illustrates a case where there is a work W lying in an improper seating state (protruding from the seating portion) among the work W on the tray T. FIG. Such a work W may not be properly held when it is transferred. The light irradiated from the sensor 321 interferes with the work W placed in an improper seating state and is not received by the sensor 321. [ Thereby, it can be detected that the work W in the improper seating position exists.

Since the work detection unit 32 is supported by the support members 305 and 305 in the present embodiment, it is moved by the mobile device 31 together with the main unit 50 and the image pickup unit 30. [ Therefore, it is possible to collectively carry out the mounting of the tray T, the image photographing and the detection of the seating sun of the work piece.

In the present embodiment, the direction of light irradiation is set to the X direction, but the direction may be a direction other than the X direction as long as the seam of the work W can be detected. Although an optical sensor is used as the sensor 321, any sensor may be used as long as it can detect the seated state of the work W. The workpiece detection unit 32 may be mounted on the base unit 50 or on the mobile body 312.

<Workpiece transfer unit>

Next, the workpiece transfer unit 4 will be described with reference to Fig. In the present embodiment, the holding structure for holding and holding the workpiece W may be used, but other holding systems such as a holding structure for holding and holding the workpiece W may be used. The workpiece conveying unit 4 includes a plurality of adsorption heads 40 disposed in the second conveying section 2 for adsorbing and holding workpieces and a plurality of adsorption heads 40 arranged in the Z direction d21 And a movable guide unit 42 for moving the plurality of adsorption heads 40 in the Y direction d23, as well as a lifting / rotating mechanism 41 for lifting and lowering the plurality of adsorption heads 40, And a guide unit 43 for moving a plurality of adsorption heads 40 across a plurality of conveying apparatuses 20 arranged side by side in the X direction d24.

The suction head 40 includes a suction nozzle 401, a mounting member 402, and a lifting mechanism 403 serving as a first moving mechanism. The lifting mechanism 403 is, for example, an air cylinder, and lifts the mounting member 402 in the Z direction. The mounting member 402 is equipped with a suction nozzle 401.

The mounting member 402 has an air passage (not shown) communicating with the suction nozzle 401. The suction nozzle 401 is connected to a suction device (for example, a vacuum pump and a pipe) not shown through the mounting member 402 to adsorb the work W.

The lifting and rotating mechanism 41 includes a movable guide unit 411, a slider 412, a turning mechanism 413, and a support member 414 for supporting the suction head 40. The movable guide unit 411 is a slider that is guided by the movable guide unit 42 and movable in the Y direction d23 and is also a guide member for guiding the movement of the slider 412 in the direction of the arrow d22 Do.

The slider 412 has an engaging portion that engages with the movable guide unit 411 and is guided by the movable guide unit 411 so as to be movable in the direction of an arrow d22 (Z direction). A turning mechanism 413 is fixed to the bottom surface of the bottom plate portion of the slider 412. The turning mechanism 413 is composed of, for example, a motor and a speed reducer, and rotatably supports the supporting member 414. [ Then, the support member 414 is rotated around the rotation center line Z1 parallel to the Z direction. The attitude of the work W to be adsorbed to the adsorption head 40 (in this case, the direction of the work W in the horizontal plane) can be changed because the adsorption head 40 also rotates by the rotation of the support member 414.

The support member 414 is a member for supporting the adsorption head 40. In this embodiment, the four adsorption heads 40 are supported by the support member 414, and four workpieces W can be simultaneously adsorbed.

The movable guide unit 42 is a slider that is guided by the guide unit 43 and movable in the direction of the arrow d24 (X direction) and guides the movable guide unit 411 to move in the direction of arrow d23 It is also absent. The guide unit 43 is disposed above the second carry section 2 and beyond the second carry section 2, and is laid between the not-shown supports.

The first moving mechanism in which the slider 412 moves on the movable guide unit 411, the second moving mechanism in which the movable guide unit 411 moves on the movable guide unit 42, and the movable guide unit 42, The third moving mechanism for moving on the unit 43 may employ a known moving mechanism and may be a transmission mechanism for transmitting the driving force of the driving source such as a motor or the like to the driving mechanism such as a belt driving mechanism, , A rack-and-pinion mechanism, etc.). A sensor such as an encoder for detecting the angular position of the slider 412, the movable guide unit 411 and the movable guide unit 42 is provided and the position control of the suction head 40 Can be performed.

With this configuration, in the present embodiment, the adsorption unit 40 can be moved three-dimensionally above the second conveying unit 2. [ The workpiece transfer unit 4 operates, for example, as follows when transferring the workpiece W.

First, at the time of adsorption of the work W, the adsorption head 40 is moved to the take-out position close to the work W by the second moving mechanism and the third moving mechanism. Subsequently, the mounting member 402 and the suction nozzle 401 are lowered by the lifting mechanism 403 serving as the first moving mechanism, so that the suction nozzle 401 is brought into contact with the work W to be adsorbed. Thereafter, the workpiece W is taken out of the workpiece mounting portion Tc, which is the transfer source, by raising the mounting member 402 and the suction nozzle 401 with the lifting mechanism 403, The adsorption head 40 is moved to a position above the target position. In the case of changing the posture of the work W, the rotation mechanism 413 is operated to rotate the suction head 40. The mounting member 402 and the suction nozzle 401 are lowered by the lifting mechanism 403 to seat the work W in the workpiece mounting portion Tc serving as the transfer destination and to release the suction of the workpiece W.

<Control Unit>

Next, the control unit of the transport system A will be described. 12 is a block diagram of the control unit 200 of the transport system A. In Fig. The control unit 200 performs control of the entire transport system A in accordance with an instruction from the host computer 210 of the higher order.

The control unit 200 controls each of the transport apparatus 10, each of the transport apparatuses 20, the mobile unit 3 (the image pickup control unit 303, the main unit 50, the moving apparatus 31, ), And outputs control commands to the workpiece conveying unit 4 to control them.

The control unit 200 includes a processing unit 201, a storage unit 202, and an interface unit 203, which are connected to each other by a bus (not shown). The processing unit 201 executes the program stored in the storage unit 202. [ The processing unit 201 is, for example, a CPU. The storage unit 202 is, for example, a RAM, a ROM, a hard disk, or the like. Various information such as the state information 61 (FIG. 9) of the work W and the state information 60 (FIG. 9) of the tray T generated by the image pickup control unit 303 are also stored in the storage unit 202 Can be remembered. The interface unit 203 includes a communication interface for performing communication between the processing unit 201 and the host computer 210 and an I / O interface for processing data input / output by the processing unit 201 and an external device.

<Example of conveyance control>

Next, a control example of the conveyance system A by the control unit 200 will be described with reference to Figs. 13 to 19. Fig. Figs. 13 to 19 are explanatory diagrams of operational examples of the transport system A. Fig. First, an operation example explained from these will be outlined. In the present embodiment, it is assumed that the work W is divided according to the product inspection result. In the sorting operation of the present embodiment, the empty tray T serving as the destination of the work W is first fed to the second conveying section 2 (Figs. 13 to 15). Next, the tray T on which the work W before division is placed is supplied to the second transport section 2 (Figs. 16 to 19). Finally, the workpiece W is transported between the trays T on the second transport section 2 (Fig. 19). Hereinafter, description will be made in order.

First, as shown in a state ST21 in Fig. 13, it is prepared in an initial state. Specifically, a tray group GT1 in which trays T on which workpieces W before division are stacked is set on the transport apparatuses 10A and 10B, respectively. Specifically, the tray group GT1 is placed on the lifting table 14a on the inner side of the tray guide 12. On the other hand, a tray group GT0 in which necessary number (three in this case) empty trays T are stacked is set in the transport apparatus 10C. The transport apparatus 20 does not have a tray T at all.

Next, the empty tray T of the tray group GT0 is supplied to the second conveying section 2. Then, The empty trays T are conveyed one by one to the conveying devices 20A, 20C and 20E. First, as shown in state ST22 of FIG. 13, the moving unit 312 of the moving unit 3 is moved, and the base unit 50 of the moving unit 3 is continuously arranged with the transport device 10C to form a transport path do. The transport apparatus 10C is driven to "single-separate" one empty tray T0 from the tray group GT0 and transports the empty tray T0 to the basic unit 50 of the moving- The photographing of the tray T0 is performed by the photographing unit 30 in the course of transporting the tray T0 from the transport apparatus 10C to the main unit 50. [ When the empty tray T0 is introduced into the main unit 50 of the mobile loading section 3, the mobile body 312 of the mobile loading section 3 is moved, and as shown in state ST23 of Fig. 14, The unit 50 is continuously arranged with the transport apparatus 20C as the transport destination of the tray T0 to form a transport path. In the process from the introduction of the tray T0 to the main unit 50 to the disposition of the main unit 50 to the transport apparatus 20C in succession, Generates status information, and transmits the created status information to the control unit (200). Naturally, in the state information of the tray T0, there is no workpiece W placed on the tray T0.

Then, as shown in state ST24 in Fig. 14, the tray T0 is transported from the main unit 50 of the mobile loading section 3 to the transport apparatus 20C. The transport apparatus 20C transports the tray T0 from the one end side to the other end side where the base unit 50 is continuously arranged and feeds the positioning mechanism 21 and 22 to position the tray T0, and thereafter, the tray T0 is positioned in the waiting state. The control unit 200 generates and associates information indicating that it exists on the transport apparatus 20C as the material information in the second transport section 2 of the tray T0 in the state information of the tray T0 .

The moving unit 3 moves the moving body 312 to carry the next empty tray T0 and the base unit 50 of the moving unit 3 is continuously placed on the carrying apparatus 10C Thereby forming a transport path. The transport apparatus 10C is driven to "single-separate" one empty tray T0 from the tray group GT0 and transports the empty tray T0 to the basic unit 50 of the moving- Thereafter, the empty tray T0 is conveyed to the conveying devices 20A and 20E in the same manner, and the empty tray T0 is brought into the standby state as shown in the state ST26 in Fig. The control unit 200 associates the material information in the second carry section 2 of the tray T0 with the state information of the tray T0.

Thus, the conveyance of the empty tray T0 is completed. In the transport apparatus 10C, there is no empty tray T0 at all. In this embodiment, the transport apparatus 10C is used as a recovery apparatus for the abnormality tray T thereafter. In the case of the present embodiment, the empty tray T0 in the standby state on the transport apparatuses 20A and 20E is used as a tray (superior article tray) on which a normal work W passing the inspection is placed. On the other hand, the empty tray T0 in the waiting state on the transport apparatus 20C is used as a tray (defect tray) on which a work W that has not passed the inspection is placed.

Next, an operation of supplying the tray T on which the work W before division is placed to the second conveying section 2 will be described. Basically the same as the conveyance of the empty tray T0. However, because the sun detection of the work W is performed by the work detection unit 32, the elevator unit 323 is driven and controlled in advance so that the sensor 321 is positioned at a predetermined height.

First, as shown in state ST31 of FIG. 16, the moving unit 312 of the moving unit 3 is moved, and the base unit 50 of the moving unit 3 is continuously arranged with the transport device 10A to form a transport path do. It is also possible to use a transport apparatus 10B instead of the transport apparatus 10A. The conveying device 10A is driven so that one tray T1 on which the work W before separation is placed is separated from the tray group GT1 and is conveyed to the main unit 50 of the moving installation section 3, To the base unit 50 as shown in Fig.

The photographing of the tray T1 is performed by the photographing unit 30 while the tray T1 is conveyed from the conveying apparatus 10A to the main unit 50 and the tray T1 ) Of the work W is detected. The image pickup control unit 303 generates the entire image and creates the status information of the tray T0, and transmits the created status information to the control unit 200. [ Further, the control unit 200 obtains the detection result of the work detection unit 32. [

The moving body 312 of the mobile loading section 3 is moved and the base unit 50 of the moving loading section 3 is moved to the tray T1 as shown in the state ST33 of FIG. The conveying path is formed by being continuously arranged with the conveying device 20D as the conveying destination of the conveying path.

Subsequently, as shown in a state ST34 in Fig. 17, the tray T1 is transported from the main unit 50 of the mobile loading section 3 to the transport apparatus 20D. The transport apparatus 20D transports the tray T1 from one end side to the other end side and positions the tray T1 by the positioning mechanisms 21 and 22 provided on the other end side, The tray T1 is positioned in a waiting state. The control unit 200 associates the material information in the second carry section 2 of the tray T1 with the state information of the tray T1.

On the other hand, when an abnormality is detected in the seating state of the work W, the moving body 312 of the moving loading section 3 is moved and the base unit 50 of the moving loading section 3 is moved, as shown in the state ST35 of FIG. The conveying path is formed by continuously arranging the conveying device 10C that is the recovery tray of the abnormal tray and the tray T1 is conveyed from the basic unit 50 of the conveying unit 3 to the conveying device 10C.

When the tray T1 is introduced into the conveying apparatus 10C, the conveying apparatus 10C pauses the conveyance of the tray T1 at an intermediate position thereof, outputs an alarm, and causes the operator to make an abnormality confirmation. In the case where the operator can confirm the abnormality of the seating state and can recover the abnormality, the operation of returning the tray (T1) to the seating part (3) And the detection is sequentially performed. Then, if there is no abnormality in the seating state of the workpiece W as a result of re-detection, the tray T1 is transported to the transport apparatus 20D of the transport destination as described in the states ST33 and ST34 in Fig.

If it is impossible to carry out the above-mentioned restoration, the conveyance of the tray T1 by the conveyance apparatus 10C is resumed on the occasion of the instruction of the worker's relieving of the restoration, and as shown in the state ST36 of Fig. 18, 14a on the tray T1. Thereafter, when a strange tray T1 is generated in the same manner, it is stacked on the lift table 14a one after another. Further, the operator may take the unusual tray T1 directly out of the transport apparatus 10C.

In the same way, the tray T1 on which the work W before division is placed is also conveyed to the conveying apparatus 20B, and is put in the waiting state as shown in the state ST37 of Fig. The control unit 200 associates the material information of the tray T1 with the state information of the tray T1.

Thus, the transportation of the tray T1 on which the work W before the division is placed is also completed. As a result, on the transport apparatuses 20A, 20C, and 20E, the empty tray T0 is positioned in the standby state, and on the transport apparatuses 20B and 20D, the tray T1 on which the work W And each of them is placed in a standby state.

Next, the work W is divided. Here, the work W is transferred (moved) between the trays T waiting on other positions of the second carry section 2 based on the state information of the trays T0 and T1 and the state information of each work W Respectively. The transfer is performed by driving the workpiece transfer unit 4 as shown in state ST38 in Fig.

Here, the work W passed the inspection is transferred from the tray T1 to the tray T0. The tray T0 as the transfer destination is the tray T0 on the transfer devices 20A and 20E. The tray T0 on the transfer apparatus 20C transfers the reject work W.

Which workpiece W is placed at any position on the tray T1 can be specified by referring to the state information of the tray. Whether or not a specific work has passed the inspection can be confirmed by referring to the state information of the work. When the work W is transported, the status information of the transport origin tray T1 is updated, and the status information of the transport destination tray T0 is also updated. Then, the work W is sequentially transferred to the empty work receiving portion Tc of the tray T0.

As described above, in the transport system A, the photographing unit 30 and the mobile loading device (the basic unit 50) are configured to move in the X direction so that the photographing unit 30 needs to be prepared for each of the plurality of conveying lines The tray T can be photographed while suppressing an increase in cost. Further, the conveyance and the photographing of the tray T can be performed at the same time, so that the lowering of conveying efficiency can be suppressed. In addition, the photographed image can also be processed during the loading operation of the tray T, so that it is possible to further suppress the reduction in conveying efficiency.

Since the photographing unit 30 employs the line sensor 301 instead of the area sensor, more clear image information can be collected while suppressing an increase in cost. Since the tray T is continuously photographed by using the movement of the tray T during the movement mounting, the entire image is generated. Therefore, it is not necessary to move the tray T only for photographing the tray T. This suppresses a reduction in conveying efficiency.

Furthermore, the manageability (traceability) of the work W can be improved by generating status information (60 in Fig. 9) of the tray T and linking it with the status information (61 in Fig. 9) .

In the present embodiment, the classification standard of the workpiece W is the inspection result, but other requirements such as the factory may be used as a standard.

<Other Embodiments>

In the above-described embodiment, the example in which the transport system A is used for the division work of the work W has been described. However, the present invention is not limited to this. That is, the present invention is not limited to the above-described embodiment, and various changes and modifications can be made without departing from the spirit and scope of the present invention. Accordingly, the following claims are appended to disclose the scope of the invention.

Claims (10)

A conveyance system for conveying a tray in which a plurality of workpiece receiving portions on which a work is placed are arranged in a matrix,
A first conveying unit having a plurality of conveying lines for conveying the tray,
A second conveying section having at least one conveying line for conveying the tray from the first conveying section,
A transporting unit for moving the tray from the transporting line of the first transporting unit to the transporting line of the second transporting unit between the first transporting unit and the second transporting unit,
And a line sensor for picking up an image of the tray, which is carried by the mobile loading apparatus, in a direction perpendicular to the moving direction of the tray, between the first carrying section and the second carrying section, ,
And a moving device for moving the moving bed device and the photographing unit in a direction transverse to the plurality of conveyance lines of the first conveyance part. The method according to claim 1,
Further comprising an image generation unit that generates an entire image of the tray based on a plurality of partial images taken by the line sensor for one of the trays. The method according to claim 1 or 2,
Further comprising a work detection sensor for detecting a seating state of the work in the tray that is mounted by the mobile on-board apparatus,
Wherein the work detection sensor is moved by the mobile device together with the mobile on-board device and the photographing unit. The method of claim 3,
Wherein the work detection sensor is arranged to detect a seating mode of the work from the side of the tray,
An elevating unit for elevating and lowering the work detection sensor,
Further comprising a drive control unit that controls the elevation unit so that the work detection sensor is positioned at a predetermined height. 5. The method according to any one of claims 1 to 4,
Further comprising an image pickup control unit for controlling an image pickup operation of the line sensor in accordance with a moving speed of the tray. The method of claim 2,
Wherein the tray is provided with tray information capable of identifying individual trays,
The work is provided with work information capable of identifying individual works,
And an information generating unit for generating information indicating a position of the tray and a work and a work mounted on the tray based on the tray information and the work information obtained from the entire image of the tray generated by the image creating unit And the transport system. The method of claim 2,
The work is provided with an identifier capable of identifying the posture of each work,
Further comprising an information generation unit that generates information indicating an attitude of the work based on the identifier obtained from the entire image of the tray generated by the image generation unit. The method according to claim 6 or 7,
Further comprising a workpiece transfer unit for transferring the workpiece among other trays waiting in the second transfer section based on the information generated by the information generation unit. The method according to any one of claims 1 to 8,
The mobile device comprising:
A guide rail extending in a direction crossing the plurality of conveyance lines,
And a moving body moving along the guide rail,
Wherein the mobile on-boarding device and the photographing unit are mounted on the moving body. The method of claim 9,
The photographing unit,
An illuminating device for illuminating the tray of the object to be imaged,
And a support member for supporting the line sensor and the illumination device,
And the support member is fixed to the moving body.

Images